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Vishay General Semiconductor - Diodes Division SMCG45CAHE3/9AT
- Part No.:
- SMCG45CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45CAHE3/9AT.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,923
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Product details
Overview
SMCG45CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), clamping voltage of 72.7 V at 20.6 A, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCG45CAHE3/9AT datasheet, SMCG45CAHE3/9AT pinout, SMCG45CAHE3/9AT application, or SMCG45CAHE3/9AT equivalent, this device is selected for high-energy surge suppression on power rails and signal lines where bidirectional clamping, low clamping ratio, and automotive-grade qualification are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions - confirmed by specification notes stating "Electrical characteristics apply in both directions" and explicit VBR/VWM ranges listed for bidirectional types. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while the DO-215AB package supports automated placement and meets MSL level 1 (260 °C reflow).
The device delivers 1500 W peak pulse power under 10/1000 µs waveform per JEDEC standards, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation on standard 8.0 mm × 8.0 mm copper pads. It is rated for -55 °C to +150 °C operating junction temperature and exhibits ≤1.0 µA maximum reverse leakage at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamping voltage under full 1500 W surge; yields clamping ratio of ~1.62, critical for downstream IC survivability. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves system power integrity in battery-powered or low-quiescent circuits. |
| TJ max. | +150 °C - Extended junction temperature rating supports under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and infotainment power supplies. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, UL 94 V-0 molding compound, and no polarity marking (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No cathode band; terminals interchangeable - enables single-component protection of AC-coupled or differential signal lines without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for dual unidirectional devices on balanced interfaces like CAN or RS-485. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing - supports Tier-1 BOM inclusion without additional qualification. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during surge events - protects 5 V–48 V logic and power ICs with tight absolute maximum ratings. |
| MSL Level 1 rating | Compatible with standard 260 °C Pb-free reflow profiles - enables direct integration into high-volume SMT lines without moisture sensitivity concerns. |
| Glass passivated junction | Ensures stable leakage current and long-term parameter stability - critical for mission-critical automotive and industrial deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary bidirectional clamping element placed at DC input stage to limit transient voltage to <75 V. Use Value: Withstands 1500 W surges and operates up to +150 °C - meets OEM requirements for under-hood placement without derating. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC analog inputs against ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS shunting transients before they reach precision ADC front-ends. Use Value: 72.7 V clamping at 20.6 A prevents saturation of 24 V signal conditioning circuitry during 1 kV/50 Ω EFT bursts. |
| Telecom Data Line Surge Suppression | Consumer USB-C Power Delivery Protection |
Use Scenario: Bidirectional protection of PoE-powered Ethernet PHY interfaces exposed to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Symmetrical clamping device placed across differential pairs (e.g., MDI-X) to suppress common-mode transients. Use Value: Identical forward/reverse behavior ensures consistent protection regardless of surge polarity - essential for IEEE 802.3bt compliance. |
Use Scenario: Overvoltage clamp on USB-C VBUS line during hot-plug events or adapter fault conditions. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS limiting VBUS spikes to <75 V before e-Mark IC or PD controller damage occurs. Use Value: 45 V VWM aligns with USB PD 3.1 extended power range (28–48 V), while 1500 W PPPM handles worst-case adapter short-circuit energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same VWM (45 V) and bidirectional design, but lower PPPM (400 W) and higher VC (113 V @ 3.5 A); SMA (DO-214AC) package. | Limited to lower-energy transients (IEC 61000-4-2 Level 3); unsuitable for load dump or IEC 61000-4-5 applications. | Select SMAJ45CA only when space constraints favor smaller SMA package and surge energy is ≤400 W. |
| SMCJ45CA | Same DO-214AB package footprint and 1500 W PPPM, but unidirectional variant (SMCJ45A) requires dual-device implementation for bidirectional use; SMCJ45CA is bidirectional with matching VWM/VC. | SMCJ45CA offers identical clamping performance (VC = 72.7 V @ 20.6 A) and AEC-Q101 qualification, but uses legacy SMC (DO-214AB) instead of SMCG (DO-215AB). | SMCJ45CA is a functionally equivalent alternative with same electrical specs but larger package; choose when DO-215AB footprint is unavailable in legacy layouts. |
Compared with SMAJ45CA and SMCJ45CA, the SMCG45CAHE3/9AT provides identical 1500 W surge capability and AEC-Q101 qualification in a lower-profile DO-215AB package optimized for high-density automotive PCBs, while avoiding the power derating or layout duplication required by lower-rated or unidirectional alternatives.
Availability
SMCG45CAHE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom data line surge suppression, and consumer USB-C power delivery protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCG45CAHE3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCG series is engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering AEC-Q101 qualified, bidirectional TVS performance in compact surface-mount packages.
FAQ
What does the 'HE3' suffix indicate in SMCG45CAHE3/9AT?
The 'HE3' suffix denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads. Specifically, 'H' indicates AEC-Q101 qualification, 'E3' confirms RoHS compliance and industrial grade, and '9AT' specifies 13-inch tape-and-reel packaging with 3500 units per reel - verified in Vishay's ordering information table on page 3 of document 88457.
Is SMCG45CAHE3/9AT suitable for protecting CAN FD bus lines?
Yes, SMCG45CAHE3/9AT is suitable for CAN FD protection due to its bidirectional symmetry, 45 V VWM (compatible with 12 V–24 V CAN supply rails), sub-1 ns response time, and low clamping voltage (72.7 V). Its DO-215AB package allows placement directly across CAN_H/CAN_L with minimal parasitic inductance - confirmed by Vishay's stated suitability for "signal lines of sensor units" in automotive applications.
What is the maximum clamping voltage of SMCG45CAHE3/9AT under surge conditions?
The maximum clamping voltage (VC) of SMCG45CAHE3/9AT is 72.7 V at 20.6 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value is explicitly listed in the Electrical Characteristics table for SMCG45CA on page 2 of document 88457 and defines the upper voltage limit imposed on protected circuitry during a full-power surge event.
Does SMCG45CAHE3/9AT require orientation during PCB placement?
No, SMCG45CAHE3/9AT does not require orientation during placement because it is a bidirectional TVS diode with no polarity marking - as stated in the Mechanical Data section: "no marking on bidirectional types." The device functions identically regardless of terminal connection direction, simplifying automated assembly and eliminating orientation-related solder defects.
How does the thermal performance of SMCG45CAHE3/9AT compare to standard SMAJ devices?
SMCG45CAHE3/9AT has RθJA = 75 °C/W and RθJL = 15 °C/W, significantly better than SMAJ-series devices (RθJA ≈ 150–200 °C/W), due to its larger DO-215AB pad area and optimized thermal path. This enables sustained 6.5 W power dissipation at TA = 50 °C - verified in the Maximum Ratings table - making it more suitable for thermally constrained automotive modules than smaller-package alternatives.
SMCG45CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG45CAHE3/9AT FAQ
1.How can I place an order for SMCG45CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45CAHE3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCG45CAHE3/9AT reliable?
The price and inventory of SMCG45CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG45CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG45CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45CAHE3/9AT?
SMCG45CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45CAHE3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCG45CAHE3/9AT?
For technical support, including SMCG45CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG45CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG45CAHE3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCG45CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG45CAHE3/9AT?
All SMCG45CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45CAHE3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCG45CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG45CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG45CAHE3/9AT Tags
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